lapacke_sgbbrd_work.c

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* Contents: Native middle-level C interface to LAPACK function sgbbrd
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_sgbbrd_work( int matrix_layout, char vect, lapack_int m,
                                lapack_int n, lapack_int ncc, lapack_int kl,
                                lapack_int ku, float* ab, lapack_int ldab,
                                float* d, float* e, float* q, lapack_int ldq,
                                float* pt, lapack_int ldpt, float* c,
                                lapack_int ldc, float* work )
{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_sgbbrd( &vect, &m, &n, &ncc, &kl, &ku, ab, &ldab, d, e, q, &ldq,
                       pt, &ldpt, c, &ldc, work, &info );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int ldab_t = MAX(1,kl+ku+1);
        lapack_int ldc_t = MAX(1,m);
        lapack_int ldpt_t = MAX(1,n);
        lapack_int ldq_t = MAX(1,m);
        float* ab_t = NULL;
        float* q_t = NULL;
        float* pt_t = NULL;
        float* c_t = NULL;
        /* Check leading dimension(s) */
        if( ldab < n ) {
            info = -9;
            LAPACKE_xerbla( "LAPACKE_sgbbrd_work", info );
            return info;
        }
        if( ldc < ncc ) {
            info = -17;
            LAPACKE_xerbla( "LAPACKE_sgbbrd_work", info );
            return info;
        }
        if( ldpt < n ) {
            info = -15;
            LAPACKE_xerbla( "LAPACKE_sgbbrd_work", info );
            return info;
        }
        if( ldq < m ) {
            info = -13;
            LAPACKE_xerbla( "LAPACKE_sgbbrd_work", info );
            return info;
        }
        /* Allocate memory for temporary array(s) */
        ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
        if( ab_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        if( LAPACKE_lsame( vect, 'b' ) || LAPACKE_lsame( vect, 'q' ) ) {
            q_t = (float*)LAPACKE_malloc( sizeof(float) * ldq_t * MAX(1,m) );
            if( q_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_1;
            }
        }
        if( LAPACKE_lsame( vect, 'b' ) || LAPACKE_lsame( vect, 'p' ) ) {
            pt_t = (float*)LAPACKE_malloc( sizeof(float) * ldpt_t * MAX(1,n) );
            if( pt_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_2;
            }
        }
        if( ncc != 0 ) {
            c_t = (float*)LAPACKE_malloc( sizeof(float) * ldc_t * MAX(1,ncc) );
            if( c_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_3;
            }
        }
        /* Transpose input matrices */
        LAPACKE_sgb_trans( matrix_layout, m, n, kl, ku, ab, ldab, ab_t, ldab_t );
        if( ncc != 0 ) {
            LAPACKE_sge_trans( matrix_layout, m, ncc, c, ldc, c_t, ldc_t );
        }
        /* Call LAPACK function and adjust info */
        LAPACK_sgbbrd( &vect, &m, &n, &ncc, &kl, &ku, ab_t, &ldab_t, d, e, q_t,
                       &ldq_t, pt_t, &ldpt_t, c_t, &ldc_t, work, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        LAPACKE_sgb_trans( LAPACK_COL_MAJOR, m, n, kl, ku, ab_t, ldab_t, ab,
                           ldab );
        if( LAPACKE_lsame( vect, 'b' ) || LAPACKE_lsame( vect, 'q' ) ) {
            LAPACKE_sge_trans( LAPACK_COL_MAJOR, m, m, q_t, ldq_t, q, ldq );
        }
        if( LAPACKE_lsame( vect, 'b' ) || LAPACKE_lsame( vect, 'p' ) ) {
            LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, pt_t, ldpt_t, pt, ldpt );
        }
        if( ncc != 0 ) {
            LAPACKE_sge_trans( LAPACK_COL_MAJOR, m, ncc, c_t, ldc_t, c, ldc );
        }
        /* Release memory and exit */
        if( ncc != 0 ) {
            LAPACKE_free( c_t );
        }
exit_level_3:
        if( LAPACKE_lsame( vect, 'b' ) || LAPACKE_lsame( vect, 'p' ) ) {
            LAPACKE_free( pt_t );
        }
exit_level_2:
        if( LAPACKE_lsame( vect, 'b' ) || LAPACKE_lsame( vect, 'q' ) ) {
            LAPACKE_free( q_t );
        }
exit_level_1:
        LAPACKE_free( ab_t );
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_sgbbrd_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_sgbbrd_work", info );
    }
    return info;
}